The City of Denver has a Barber-Greene batch plant rated at 250 tons per hour. There is a bag house for air pollution control and we find that this is very adaptable to hot mix recycling. The recycled material is injected behind the bag house. Thus the quality of mix produced is equal to or better than the virgin mix. One of the problems encountered with the virgin mix was inadequate fines (passing a #200 sieve). By adding the recycled material more fines are introduced. The greater concentration of fines is a result of the grinding procedures which occur during removal. It is required that the virgin rock be heated approximately 50 deg F. to 60 deg F. above what would be required for non-recycled material, but the resulting temperature at the laydown machine is adequate. The batch plant is operated by natural gas, which at this point is still the cheapest source of fuel available. We find the stationery batch plant is advantageous from the standpoint of being located in a central point of the City, and since all of the work occurs in Denver, there is no need for a mobile plant. (Author)

Media Info

  • Media Type: Print
  • Features: Figures; Tables;
  • Pagination: pp 130-132
  • Monograph Title: Proceedings of the National Seminar on Asphalt Pavement Recycling
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00334559
  • Record Type: Publication
  • ISBN: 030903101X
  • Files: TRIS, TRB
  • Created Date: Oct 28 1981 12:00AM